KR101546086B1 - Disassembling tool for pressure control valve of diesel engine high pressuer pump - Google Patents

Disassembling tool for pressure control valve of diesel engine high pressuer pump Download PDF

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Publication number
KR101546086B1
KR101546086B1 KR1020150054758A KR20150054758A KR101546086B1 KR 101546086 B1 KR101546086 B1 KR 101546086B1 KR 1020150054758 A KR1020150054758 A KR 1020150054758A KR 20150054758 A KR20150054758 A KR 20150054758A KR 101546086 B1 KR101546086 B1 KR 101546086B1
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KR
South Korea
Prior art keywords
piston
housing
rotating
slit
coupled
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KR1020150054758A
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Korean (ko)
Inventor
고동원
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고동원
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Priority to KR1020150054758A priority Critical patent/KR101546086B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/023—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same using screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B33/00—Hand tools not covered by any other group in this subclass

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

A disassembling tool for separating a piston housing from a valve body of a pressure control valve comprises: a vertical moving piston which has a binding slit bound to an O-ring bonding groove of a side surface of the piston housing, wherein a first thread is formed on an inner surface; a piston receiving body where the vertical moving piston moves in a hollow, an exposure slit exposing the binding slit of the vertical moving piston is formed, and the lower portion thereof is supported by a mounting flange; and a rotary body penetrating the upper portion of the piston receiving body and having a second thread bound to the first thread. The present invention can separate the piston housing from the binding groove of the valve body by rotating the rotary body.

Description

DISCHARGE TOOL FOR PRESSURE CONTROL VALVE IN DIESEL HIGH PRESSURE PUMP [0001]

The present invention relates to a decomposition tool used for maintenance of a high pressure pump in a diesel engine, and more particularly to a decomposition tool for decomposing a pressure control valve mounted on a diesel high pressure pump.

The role of the high-pressure pump in a diesel engine is to provide a sufficient supply of high-pressure fuel, and it must also have the function of reserving fuel for rapid pressure rise on a common-rail (common rail) and smooth start. The high-pressure pump continuously generates the pressure in the high-pressure accumulator independently of the injection. Most high-pressure pumps are installed in a conventional diesel engine at a position where a distributing injection pump is installed. The operation principle of the high-pressure pump has already been widely disclosed, and a detailed description thereof will be omitted. As for the high-pressure pump, Korean Patent Laid-open Publication Nos. 10-2002-0004006 and 10-2009-0122017 can be referred to.

On the other hand, there are many cases in which the vehicle is running and the intermittent start-off is caused by fuel supply problems, and the replacement of the high-pressure pump frequently occurs in old vehicles. However, even if there is a problem with the high-pressure pump, it is very uncommon to replace the entire high-pressure pump due to limitations in cost and replacement time. A pressure control valve, which is a main component for controlling the amount of fuel sent to the high- METERING VALVE) or LP actuator) is solved, the above problem is solved in many cases. For reference, the role and structure of the inlet metering valve can be found in Korean Patent Laid-open Publication Nos. 10-2014-0041899 and 10-2002-0004006.

The present invention provides a disassembly tool capable of easily separating a piston housing from a valve body of a pressure regulating valve.

According to an exemplary embodiment of the present invention, a pressure control valve coupled to a pump housing of a diesel high pressure pump includes a valve body coupled to the pump housing by an outwardly disposed mounting flange, And a piston housing which is inserted into the pump housing so as to be inserted into the coupling groove and inserted into the coupling groove and which forms an O-ring coupling groove for the O-ring to maintain airtightness with the pump housing along the outer periphery, A disassembly tool for disengaging a piston housing from a coupling groove of a body is disclosed. The decomposition tool includes a vertically moving piston having a binding slit slidingly coupled to an O-ring binding groove at a side surface of the piston housing, and having a first screw thread formed on a hollow inner surface thereof; A piston accommodating body accommodating the up and down movement piston such that the up and down movement piston moves upward and downward in the hollow while the exposure slit is formed on the side so as to expose the binding slit of the up and down movement piston and the lower end face is tightly supported on the mounting flange; And a rotating body which is inserted into the hollow interior of the piston accommodating body through a through hole that communicates with the hollow interior of the piston accommodating body at an upper portion of the piston accommodating body and a second screw thread is screwed to the first screw thread at an outer surface thereof do. By the rotation of the rotary body, the piston can be separated from the coupling groove of the valve body by lifting up the piston housing in which the up-and-down movement piston is moved upward and is inserted into the coupling groove and engaged with the valve body. It is not easy to pull the piston housing out of the valve body with a force, because the piston housing is very tightly engaged to prevent it from easily separating from the coupling groove. However, it is possible to easily remove the piston housing from the valve body by using the decomposition tool according to the present invention, and it is easy to check the fuel control valve which may cause a lurch during the running of the vehicle, an intermittent start-off,

Further, the lower end surface of the piston accommodating body is formed with a step to support the mounting flange from the side, and when the rotary body is rotated to pull the piston housing out of the valve body, the piston accommodating body is prevented from rotating with respect to the mounting flange can do.

In addition, the piston receiving body may be provided with a vertical movement restricting slit formed to penetrate to the hollow inside along the vertical direction of the piston accommodating body. The upper and lower moving pistons are connected to the upper and lower moving pistons through the upper and lower movement restricting slits, It is possible to limit the distance that the piston is moved up and down in the hollow of the body for accommodating the piston, and it is possible to prevent the up-and-down moving piston from being separated from the inside of the piston accommodating body irrespective of the coupling relation of the rotating body.

The decomposing tool may further include a rotating rod that is vertically coupled to the rotating shaft of the rotating body at a top of the rotating body, and may rotate the rotating body by rotating the rotating rod. It is not easy to pull the piston housing out of the valve body with a force, because the piston housing is very tightly engaged to prevent it from easily separating from the coupling groove. However, the operator can easily rotate the rotating body using the rotating rod.

It is necessary to separate the piston housing from the valve body when the pressure regulating valve in the high pressure pump of the diesel engine vehicle, in particular, the piston arranged inside the piston housing, is subject to scratches or the replacement of the filter mounted around the piston housing is required . However, it is not easy to pull out the two parts which are tightly coupled with each other by the force, so that the piston housing can be easily separated from the valve body using the decomposing tool according to the present invention. In particular, the piston receiving body coupled to the coupling groove of the valve body can be lifted through the rotational force of the rotary body, thereby improving the working efficiency.

Further, a step is formed on the lower end surface of the piston accommodating body to support the mounting flange from the side. When the rotary body is rotated by this, the piston accommodating body is prevented from rotating with respect to the mounting flange, It is possible to prevent the piston housing from being idle.

Further, a rotating rod is further vertically mounted on the rotating body so that an operator can easily rotate the rotating body through the rotating rod.

1 is a perspective view showing a high-pressure pump of a diesel engine equipped with a pressure control valve.
2 is a perspective view of a pressure control valve separated from a high-pressure pump.
3 is a perspective view showing a state in which the piston housing is detached from the coupling groove of the valve body of the pressure control valve.
4 is a perspective view of a disassembly tool according to an embodiment of the present invention for separating a piston housing from a valve body.
5 is an exploded perspective view of a disassembly tool according to an embodiment of the present invention.
6 is a cross-sectional view of the decomposing tool according to an embodiment of the present invention in which the binding slit of the up-down moving piston is slidingly coupled to the O-ring binding groove from which the O-ring is removed.
7 is a cross-sectional view of the piston body lifted from the coupling groove of the valve body by rotating the rotary body in the state of FIG. 6;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments. For reference, the same numbers in this description refer to substantially the same elements and can be described with reference to the contents described in the other drawings under these rules, and the contents which are judged to be obvious to the person skilled in the art or repeated can be omitted.

1 is a perspective view showing a high-pressure pump of a diesel engine equipped with a pressure control valve, FIG. 2 is a perspective view of a pressure control valve separated from a high-pressure pump, FIG. 4 is a perspective view of a disassembly tool according to an embodiment of the present invention for separating a piston housing from a valve body, and FIG. 5 is a perspective view illustrating a disassembly tool according to an embodiment of the present invention. 6 is a sectional view of the decomposing tool according to the embodiment of the present invention in which the binding slit of the up-down moving piston is slidingly coupled to the O-ring binding groove from which the O-ring is removed, and Fig. 7 is a cross- And the piston housing is lifted up from the coupling groove of the valve body by rotating the rotary body in the state of FIG.

First, FIG. 1 shows a high-pressure pump that supplies high-pressure fuel to a common-rail of a diesel engine. The high-pressure pump 10 is equipped with a pressure control valve 20 for controlling the amount of fuel supplied to the high-pressure pump 10 by receiving low-pressure fuel flowing from an external fuel storage space.

The pressure regulating valve 20 shown in FIGS. 2 and 3 may be directly connected to the common rail. However, the pressure regulating valve 20 may be mounted on the high-pressure pump, and may be provided in various shapes depending on the vehicle manufacturer and the type of vehicle. Basically, the function of controlling the hydraulic pressure is the same, and the basic components are also the same.

Specifically, the pressure regulating valve 20 has a valve body 22 formed with a coupling groove 24 for engaging and fitting a cylindrical piston housing 27 at an inner center thereof. And has a mounting flange 23 extending outwardly of the valve body 22 for mounting the valve body 22 to the pump housing 12 of the high-pressure pump 10. The mounting flange 23 is provided with a threaded hole 26 through which a coupling screw 25 passes and through which the valve body 22 is connected to the pump housing 12 of the high- ). The piston housing 27 is tightly coupled to the coupling groove 24 and the piston housing 27 is inserted into the coupling groove 24 and coupled to the valve body 22, As shown in Fig. For reference, a filter 29 accommodating the periphery of the piston housing 27 may be further disposed.

1 and 2, a portion of the pressure regulating valve 20 exposed to the outside of the pump housing 12 is provided with a power plug (not shown) for supplying power to a solenoid for moving the piston disposed inside the piston housing 27 30 are disposed.

On the other hand, an O-ring (40) is disposed outside the piston housing (27) to maintain airtightness with the inner surface of the passage for fuel supply formed inside the pump housing (12) along the outer periphery of the piston housing (27) An O-ring binding groove 28 is formed in the outer surface of the piston housing 27 for this purpose. The O-ring 40 is removed from the O-ring binding groove 28 and the decomposition tool according to the present invention is coupled to separate the piston housing 27 from the valve body 22 .

Also, a groove is formed on the outer side of the valve body 22 in addition to the O-ring binding groove 28 formed in the piston housing 27, and a separate O-ring is further provided in the groove.

The pressure regulating valve mounted on the high-pressure pump and the high-pressure pump, which are described in detail with reference to Figs. 1 to 3, often require replacement or maintenance. Specifically, when a scratch is generated in the pressure regulating valve, particularly, the piston housing or the inner piston in a high pressure pump of a diesel engine vehicle, or when replacement or cleaning of a filter mounted around the piston housing is required, the piston housing is separated from the valve body, Or it is necessary to replace the piston housing, or to clean or replace the filter outside the piston housing.

Hereinafter, the decomposing tool according to the present invention for checking the fuel control valve will be described in detail with reference to FIGS. 1 to 7. FIG.

The decomposition tool 100 of the present invention includes a vertically moving piston 110, a piston receiving body 120, a rotating body 130, and a rotary rod 140.

The vertically moving piston 110 is formed with a coupling slit 111 that slidably enters the O-ring coupling groove 28 at the side surface of the piston housing 27 and is coupled to the upper portion of the piston housing 27, A first screw thread 112 is formed.

The piston receiving body 120 receives the up-and-down moving piston 110 and is provided so that the up-down moving piston 110 can move up and down in the hollow. Further, the exposure slit 121 is formed on the side portion so as to expose the binding slit 111 of the vertically moving piston 110. The exposure slit 121 can be provided so that the piston housing 27 can be directly inserted into and removed from the side portion.

The lower end face 125 of the piston accommodating body 120 is closely contacted with the mounting flange 23 and when the piston housing 27 is lifted upward by rotating the rotary body 130, Is supported by the mounting flange 23 to prevent the piston receiving body 120 from moving downward.

The rotary body 130 is partially inserted into the hollow interior of the piston accommodating body 120 through the through hole 122 that communicates the hollow interior of the piston accommodating body 120 with the upper portion of the piston accommodating body 120, On the outer surface of the inserted portion, a second screw thread 132 screwed to the first screw thread 112 is formed.

The vertical movement piston 110 and the rotary body 130 are coupled to each other by the first screw thread 112 and the second screw thread 132 so that the rotary motion of the rotary body 130 is performed by the linear movement of the vertical movement piston 110 can be changed.

The piston receiving body 120 is formed with a vertical restricting slit 123 formed to penetrate to the inside of the hollow along the longitudinal direction of the piston accommodating body 120. The upper and lower restricting slit 123 penetrates through the vertical restricting slit 123, The movement of the upper and lower moving pistons 110 in the hollow interior of the piston receiving body 120 is limited by the binding pin 124 bound to the rotating body 130, It is possible to prevent the up-and-down movement piston 110 from being detached from the inside of the piston accommodating body 120. [

6, the O-ring binding groove 28 from which the O-ring 40 is removed is bound to the binding slit 111 exposed by the exposure slit 121, and the O- It is possible to separate the piston housing 27 in a strongly coupled state with the coupling groove 24 of the valve body 22 when the rotary body 130 is rotated to lift the piston housing 27 upward . For reference, when the piston receiving body 120 has an inner hollow capable of inserting the piston housing even when the filter is engaged, the piston housing can be detached while the filter is left, It is also possible to separate the piston housing after removing the filter together with the piston 40.

The upper and lower moving pistons 110 are moved upward by the rotation of the rotating body 130 to lift the piston housing 27 fitted into the coupling groove 24 and engaged with the valve body 22, It is possible to separate the piston housing 27 from the coupling groove 24 of the piston housing 27. It is not easy to pull the piston housing 27 out of the valve body 22 with a force because the piston housing 27 is very tightly engaged so as not to easily separate from the coupling groove 24. However, It is possible to easily remove the piston housing 27 from the valve body 22 by using the valve 100, and it is easy to check the pressure regulating valve which may cause a lurching during the running of the vehicle, an intermittent start-off,

Particularly, the disassembling tool 100 of the present embodiment further includes a rotating rod 140 that is vertically coupled to the rotating shaft 130 of the rotating body 130 at an upper portion of the rotating body 130, So that the rotating body 130 can be rotated. The rotating body 130 can be easily rotated using the rotating rod 140. [

The lower end surface 125 of the piston accommodating body 120 according to the present embodiment is formed with a stepped portion to support the mounting flange 23 from the side surface and the piston housing 27 is supported by the valve body 22 The rotating body 130 is prevented from rotating with respect to the mounting flange 23 by rotating the rotating body 130 in order to pull the piston body 130 together with the piston housing body 120 Can be prevented from being idle.

Although the present invention has been described with reference to the preferred embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the following claims. It can be understood that

10: high pressure pump 12: pump housing
20: pressure regulating valve 22: valve body
23: mounting flange 24: fastening groove
25: coaxial screw 27: piston housing
28: O-ring binding groove 29: filter
30: Power plug 40: O-ring
100: Disassembly tool 110: Up and down moving piston
111: engaging slit 112: first thread
120: piston receiving body 121: exposure slit
122: Through hole 123: Up and down movement limiting slit
124: binding pin 130: rotating body
132: second screw thread 140: rotating rod

Claims (4)

A pressure control valve coupled to a pump housing of a diesel high pressure pump includes a valve body coupled to the pump housing by an outwardly disposed mounting flange and having a coupling groove formed at an inner center thereof, And a piston housing which is inserted into the pump housing in a state where the O-ring is coupled to the pump housing and which has an O-ring binding groove for an O-ring to maintain airtightness with the pump housing along the outer periphery, Said piston housing comprising:
A vertically moving piston in which a binding slit slidingly coupled to the O-ring binding groove is formed on a side surface of the piston housing, and a first screw thread is formed on an inner surface of the hollow;
A piston accommodating body accommodating the up and down movement piston, the up and down movement piston being moved upward and downward in the hollow, an exposure slit is formed on a side surface to expose the binding slit, and a lower end face is closely contacted to the mounting flange; And
And a second screw thread is formed on the outer surface of the piston receiving body so as to be screwed to the first screw thread through a through hole that communicates the hollow inside of the piston receiving body from the upper portion of the piston receiving body, Body;
Wherein the piston body is inserted into the coupling groove while lifting up the piston housing in a state of being coupled to the valve body by the rotation of the rotary body to move the piston from the coupling groove of the valve body to the piston body, Separating the housing,
Wherein the lower end surface of the piston receiving body is formed with a step to support the mounting flange laterally to prevent the piston receiving body from rotating relative to the mounting flange upon rotation of the rotating body. delete The method according to claim 1,
The piston receiving body is provided with a vertical movement restricting slit formed to penetrate to the hollow inside along the vertical direction of the piston receiving body,
Wherein a distance through which the up-and-down moving piston moves up and down in the hollow interior of the piston receiving body is limited by a binding pin passing through the up-and-down movement limiting slit and engaged with the up-and-down moving piston. The method according to claim 1,
And an upper portion of the rotating body includes a rotating rod vertically coupled to the rotating shaft of the rotating body, and rotates the rotating body by rotating the rotating rod.
KR1020150054758A 2015-04-17 2015-04-17 Disassembling tool for pressure control valve of diesel engine high pressuer pump KR101546086B1 (en)

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KR1020150054758A KR101546086B1 (en) 2015-04-17 2015-04-17 Disassembling tool for pressure control valve of diesel engine high pressuer pump

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101727436B1 (en) * 2016-10-13 2017-04-14 변용선 Assembly tool to Plunger of internal combustion engine Injector
KR101776099B1 (en) * 2015-08-28 2017-09-08 (주)우신엔지니어링 Zig apparatus for moving shaft relative to oil booth
KR20180003680U (en) 2018-03-05 2018-12-28 김재리 Separation tool for arc control head

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3016741B2 (en) * 1996-12-24 2000-03-06 コナミ株式会社 Image synthesis display device and image synthesis display method
JP2001347470A (en) * 2000-06-06 2001-12-18 Hitachi Building Systems Co Ltd Roller pulling-out jig
KR101354371B1 (en) * 2013-08-19 2014-02-04 (주)제이에스더블유 Apparatus for removal valve stem seal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3016741B2 (en) * 1996-12-24 2000-03-06 コナミ株式会社 Image synthesis display device and image synthesis display method
JP2001347470A (en) * 2000-06-06 2001-12-18 Hitachi Building Systems Co Ltd Roller pulling-out jig
KR101354371B1 (en) * 2013-08-19 2014-02-04 (주)제이에스더블유 Apparatus for removal valve stem seal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101776099B1 (en) * 2015-08-28 2017-09-08 (주)우신엔지니어링 Zig apparatus for moving shaft relative to oil booth
KR101727436B1 (en) * 2016-10-13 2017-04-14 변용선 Assembly tool to Plunger of internal combustion engine Injector
KR20180003680U (en) 2018-03-05 2018-12-28 김재리 Separation tool for arc control head

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